Flower Initiation Pattern, Developmental Stages, and Seed Morphology of Paraphalaenopsis Labukensis P.S. Shim, A. Lamb & C.L. Chan, An Endangered Orchid in Sabah

Heira Vanessa Nelson and Jualang Azlan Gansau and Nor Amirah Shamsudin and Nor Azizun Rusdi (2024) Flower Initiation Pattern, Developmental Stages, and Seed Morphology of Paraphalaenopsis Labukensis P.S. Shim, A. Lamb & C.L. Chan, An Endangered Orchid in Sabah. The Open Agriculture Journal, 18. pp. 1-11. ISSN 1874-3315

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URL: https://openagriculturejournal.com/VOLUME/18/ELOCA...

Abstract

Background: Paraphalaenopsis labukensis P.S. Shim, A. Lamb & C.L. Chan is a monopodial epiphytic species that can only be found in Sabah. P. labukensis orchids have unique characteristics in that it has a long floral lifespan as compared to other orchid species. The flower developmental pattern of P. labukensis greatly influenced capsule formation and seed maturation. Objective: The present research was conducted to record the initiation of flower initiation, and floral morphology, and to observe the flowering and capsule development, as well as the effect of different capsule ages on asymbiotic seed germination. Methods: A total of three individual plants of P. labukensis were observed. The flowering stages were characterized by quantitative parameters such as length of inflorescence, diameter, and length of buds, the number of flowers produced, and the length of the capsule formed. All the data were recorded through direct observation. Results: Overall, twelve morphological landmark that define each stage of floral development was recorded. Based on the observation, P. labukensis inflorescence was asymmetric and in the shape of a panicle. The number of flowers varied among inflorescences, ranging from 3–5, that blossomed at different times. Furthermore, early capsules appeared 40–90 days after pollination (DAP). Then, 120 DAP of the capsule was selected as the most suitable capsule age for germination as it had reached its maturation period. Conclusion: Identifying the duration of the whole flowering developmental process will aid in the production of capsules to attain a reliable and adequate seed source for in vitro seed germination.

Item Type:	Article
Keyword:	Bud, Capsule, Floral development, Inflorescence, Pollination, Spike
Subjects:	Q Science > QK Botany > QK1-989 Botany > QK640-(707) Plant anatomy S Agriculture > SB Plant culture > SB1-1110 Plant culture > SB403-450.87 Flowers and flower culture. Ornamental plants
Department:	INSTITUTE > Institute for Tropical Biology and Conservation
Depositing User:	SITI AZIZAH BINTI IDRIS -
Date Deposited:	15 Jul 2024 12:14
Last Modified:	15 Jul 2024 12:14
URI:	https://eprints.ums.edu.my/id/eprint/39182

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